26397538 has 4 divisors (see below), whose sum is σ = 39596310. Its totient is φ = 13198768.

The previous prime is 26397533. The next prime is 26397559. The reversal of 26397538 is 83579362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83579362 = 2 ⋅41789681.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 1026169 = 5037^2 + 1013^2 .

It is a super-2 number, since 2×26397538² = 1393660024922888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26397494 and 26397503.

It is not an unprimeable number, because it can be changed into a prime (26397533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6599383 + ... + 6599386.

Almost surely, 2^26397538 is an apocalyptic number.

26397538 is a deficient number, since it is larger than the sum of its proper divisors (13198772).

26397538 is a wasteful number, since it uses less digits than its factorization.

26397538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13198771.

The product of its digits is 272160, while the sum is 43.

The square root of 26397538 is about 5137.8534428300. The cubic root of 26397538 is about 297.7518541432.

The spelling of 26397538 in words is "twenty-six million, three hundred ninety-seven thousand, five hundred thirty-eight".